Question: I need help solving these problems A given sentential formula is a tautology if and only if: Its negation has all tree-paths closed. It has

I need help solving these problems

A given sentential formula is a tautology if and only if: Its negation has all tree-paths closed. It has all tree paths closed. It does not have all tree paths closed. A given sentential formula is a contradiction if and only if: Its negation has all tree-paths closed. It has all tree paths closed. It does not have all tree paths closed. Use the tree method to determine if the following set of sentences is consistent. CONSISTENT/INCONSISTENT Use the tree method to determine if the following sentence is a tautology. ((p superset q) superset p) superset p TAUTOLOGY- Not a Tautology Use the tree method to determine if the following argument form are valid or invalid. p superset q tilde p superset q/-q VALID-INVALID p v q p superset r q superset r/- r VALID-INVALID p superset q p superset r/- q superset r VALID-INVALID p congruent tilde q/- p congruent q VALID-INVALID

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